Question

Библиотеке надо переплести 900 книг первая мастерская может выполнить эту работу за 10 дней 2 за 15 сколько дней вы план выполнили работы мастерские если будут работать вместе

Answer 1

900:10=90 книг в один день первая мастерская
900:15=60 книг                        вторая мастерская
90+60=150книг в один день обе мастерские
900:150=6 дней работая вместе.

Answer 2

Calculation of Work Completion Time for Two Workshops

To calculate the time it would take for two workshops to complete the task of rebinding 900 books, we need to consider the individual completion times of each workshop and their combined efficiency when working together.

According to the information provided, the first workshop can complete the task in 10 days, while the second workshop can complete it in 15 days.

To determine the time it would take for both workshops to complete the task together, we can use the concept of "work rates." The work rate is the amount of work completed per unit of time. In this case, we can calculate the work rates for each workshop as follows:

- The first workshop's work rate is 1/10 (1 book per 10 days). - The second workshop's work rate is 1/15 (1 book per 15 days).

When the two workshops work together, their work rates can be added to determine the combined work rate. Therefore, the combined work rate is:

1/10 + 1/15 = 3/30 + 2/30 = 5/30 (5 books per 30 days).

To find the time it would take for both workshops to complete the task together, we can use the formula:

Time = Total Work / Combined Work Rate.

In this case, the total work is 900 books. Substituting the values into the formula, we get:

Time = 900 / (5/30) = 900 * (30/5) = 5400 / 5 = 1080 days.

Therefore, if the two workshops work together, it would take them approximately 1080 days to complete the task of rebinding 900 books.

Please note that the above calculation assumes that the work rates remain constant throughout the entire duration of the task and that there are no other factors that may affect the completion time.